Engine truck



Jan. 13, 1931. E. M. sHANNoN ENGINE TRUCK Filed June 10, 1930 s Sheets-Sheet i ,QZ 6%07/14 2 ,Jy 777:?75. m ff Jan. 13, 1931. E. M. SHANNON 1,789,199

ENGINE TRUCK Filed June 10, 1930 3 Sheets-Sheet 2 wariii Jan. 13, 1931. E. M. SHANNON ENGINE TRUCK 3 Sheet s-Sheet 3 Filed June 10 1930 Patented Jan. 13, 1931 UNITED STATES EIIIIWOOD M. SHANNON, F BALAIPENNSYLVANIA.

ENGINE TRUCK Application filed June 10, 1930. Serial No. 400,228. I

My invention relates to certain improvements in four-wheel locomotive trucks of the type having depressed frames to allow it to move freely under the large cylinders of the locomotive, but the invention can be used in other types of locomotives or rolling stock without departing from the essential features of the invention.

The invention also relates to certain improvements in the details of construction of the locomotive truck for which patent was granted to Chas. F. Krauss and Henry K.

Harwick, No. 1,750,527 on March 11, 1930.

One object of the invention is to so design a truck of the above type that a locomotive having large cylinders can be used with comparatively small driving wheels.

Another object of the invention is to provide means for suspending the semi-elli tic spring of the truck so that they can be rea ily removed when necessary.

A further object of the invention is to rovide means for preventing the fallin o the bolster to the ground in the event 0 any of the swing links or pins failing.

A. still further object of the invention is to so design the frame and the bolster that the bolster can be raised to a certain level and moved laterally into position.

In the accompanying drawings:

Fig. 1 is a side view of my improved truck;

Fig. 2 is a longitudinal sectional view on the line 2-2, Fig. 3;

Fig. 3 is a plan view of the truck;

Fig. 4 is a transverse sectional view on the line 44, Fig. 3

Fig. 5 is an enlarged side view of a portion of the spring suspension;

Fig. 6 is a sectional view on the line 6-6, 40 Fig. 5;

Fig. 7 is a detached perspective view of one of the spring-suspension links; and

Fig. 8 is a perspective view illustrating one end of a spring.

1 is the frame of the truck having side members 22 and transverse members 3-3 and 44. These members 3 and 4 are spaced a suificient distance apart for the accommodation of the links 5, which are hung from pins 6-6 on the frame and have at their lower ends eyes through which extend the bars 7 which support the bolster 8. 9 is the center plate of the bolster having a center pin opening 10, and the lower portions 11 of the bolster 8 partly encircle the bars as shown in Fig. 4. On the ends of the bolster are bearings 12 which rest directly on the bars, the balance of the bolster being clear of the bars as shown in Fig. 4 and secured thereto by key plates 13. On the transverse members 4 of the frame 1 are wear plates 14 against which bear the projections 15 on the bolster 8. On each transverse member 4 below the wear plates is a flange 16 which underlaps the portion 15 of the bolster so that in the event of any of the links breaking, the bolster will be caught by the flanges 16 and held from dro ping onto the ground.

T he side members 2 of the frame 1 are in the form of-inverted channels having side members 17 which enclose the semi-elliptic springs 18. The frame rests upon the centers of these springs. Equalizing bars 19 are depressed at the center and the ends of these bars extend over and rest upon the boxes 20 for the axles 21, the boxes being mounted between pedestals 22 and 23, forming an integral part of the frame 1. In the present instance wear plates are secured to the pedestals but it will be understood that the type of the pedestal and the type ofthe axle box may be modified without departing from the essential features of the invention.

The equalizing beams 19 are in the form of inverted spaced angles as shown in Fig. 6, having flanges 24' at each side. At the upper edges of the depressed portions of the equalizing beams are inwardly projecting bosses 25 through which the suspension pins 26 of the links 27 extend. Each link has a hub member 28, a narrow web 29 and a T-head 30. This T-head is rounded at the upper edge as shown in the drawings. Resting on the projecting portions of the T-head is a slotted spring clip 31 and the ends of the semi-elliptic springs 18 are notched at 18a, so as to receive the web 29 of the links and to rest upon the spring clip which is suported by the T-head. This construction alowe. the springs to be arranged very low so I that the side members of the'frames,the equalizing beams and the s rings will not interfere with the large cy inders which may be used in connection with the small driving wheels of a locomotive.

I claim:

1. The-combination inalocomotive truck, of'a frame having pedestals for-the axle boxes, said frame being depressed at the. sides between each set of pedestals and raised at the center of the truck,'said frame having two integral sets of transverse members, the members of each set being spaced apart; links suspended fromthe said transverse members; a bolster carried by the links; an equalizing beam at each side of the truck; semi elliptic springs hung from the beams and supporting the frame, the inner transverse members of the frame having inwardly projecting ribs which underlap projecting portions of the bolster so that in the event of any of the parts breaking the bolster will be prevented from falling to the ground.

2.- The combination in a locomotive truck,

of an integral main frame consisting of side members and two sets of transverse members spaced apart; pedestals at each end ofuthe side members of the frame, saidside members being depressed between the pedestals but elevated at the center of the truck; links suspended from the transverse members; a bolster carried by the links; axle boxes; an equalizing beam at each side of the truck depressed at the center and raised at the ends to extend over the tops of the boxes; inwardly extending bosses on the equalizing beam; pins extending through the bosses from which the links are suspended, the lower ends of the links having T-heads; and semielliptic springs slotted at each end. to engage the T-headed links, said spring supporting the frame of the truck.

3. The combination in a locomotive truck, of an integral frame having longitudinal side members and two sets of transverse members spaced apart, the members of each set also being spaced apart, said transverse members being at a greater elevation in the center of the truck than at the sides, the inner members of each transverse set having projecting flanges; links suspended from transverse members; bars carried by the links; and a bolster having a center bearing and having projections at each side which overlap the flanges of the transverse members, the space between the ends of the said flanges and the side members of the frame bein such that the bolster can be inserted throug the space from the bottom and moved transversely into the central position. v

ELLWOOD M. SHANNON. 

